[rottencupcakes]

It's the fiercest at the moment! Lyft and Uber are engaged in an epic price war, where each of them is subsidizing the cost of rides while trying to expand as quickly as possible to new cities to best the other.

In about a year, this competition has halved the cost of getting between any two places in San Francisco. It's quite thrilling.

[viscanti]

According to the infographic, it doesn't look like much of a rivalry. It's a bit embarrassing for Lyft to not be anywhere internationally.